Carbureter.



R. I-I. WHITE.

GARBAURBTBR.

APPLICATION FILED FEB.I4, 1912.

Patented Jan. 21, 1913.

2 SHEETS-SHEET 1.

@gw @IM c i 5 lll SISI E mmlm ff "D k rn IEW. vullingMA v R. H. WHITE.

GARBURETER.

APPLICATION FILED 11:13.14, 1912.

2 SHEETS-SHEET 2.

Patented M1121, 1913.

i ITE' STAIIES PATENT OFFICE.

BOLLIN H. WHITE, OF CLEVELAND HEIGHTS VILLAGE, OHIO, ASSIGNOR T THE WHITE COMPANY, 0F CLEVELAND, OHIO, A CORPORATIGN OF OHIO.

CABBURETEB.

Specification of Letters Patent.

Patented Jan. 21, 1913.

Application led february 14, 191.2. Serial No. 677,510.

- form in quality at all times, to enable the engine to efficiently and economically perform its work under all the varying conditions of road'service.

The tinvention involves, as its primary novel features, the use of plural feed nozzles, an air intake tube of variablesize associated with each fuel nozzle and withinv which the associated fuel nozzle is disposed, and valve mechanism by which one of these air intake tubes may be opened and gradu'.

ally enlarged before the other is opened at all, and -by which, thereafter, both may be gradually enlarged until they assume their.

maximum size.

The invention also includes as a novel feature, but subordinate to the main feature referred to, a single valve which will, by its movement, control in the manner stated the opening and enlarging of said air tubes, and their gradual restriction and the complete closing of one in advance of the other.

The invention also includes certain subordinate but novel features of construction which contribute to the eliciency of the device'; all of which are shown in the drawing, and hereinafter described and definitely pointed out in the appended claims.

In the drawing, Figure 1 is a side elevation of a carbureter, in which the invention is embodied. Fig. 2 is `a vertical section thereof in the lplane of line 2 2 on Fig. 3. Fig. Bis a vertical section in the plane of line 3-3 on Fig. 1. Fig. 4 is a bottom view of the valve casing,-the fuel nozzles being shown in section; and Fig. 5 is adevelopment of the valve showing its relati to the openings in the valve casing.

eferring to the parts by letters, A repsents the usual float controlled fuel chalu- `may be termed slots e, e".

Bl represents the valve casing.

is above the valve casing and is adaptedto be connected with the manifold of i the engine.

F represents an arm to which the two nozzles D, D are screwed so as to communicate with the fuel duct f in said arm', through which fuel may flow unrestrictedly from the fuel chamber A tosaid nozzles.

In the construction shown, all of the elements specied, except the nozzles, are parts of a single `casting, although this is not an essential. v y

The valve casing B as shown, is cylindrical with .its axis disposed horizontally. It has two openings b, 'b, preferably circular in form in its lower wall, and two openings b2, b3, similar in form and located directly over the openings b, b' respectively. It is through the openings b, b that air may flow into the valve casing, and it is through the openings b2, b3 that'the air and.

fuel vapor or spray may flow from the valve casing into the mixing chamber U E represents a cylindrical valve which 1s nicelyfitted in the valve casing, and is caf It has at.

slightly venturi shaped, and the hole e2 isl of slightly larger diameter than the hole e. So also are the holes b andbs slightly larger than the lholes b, and b2. When the valve is in its wide open position, these holes form parts of the air tube through which air entering through the openings b,

mav flow to and through the openings '122, ba into the mixin chamber.

The two fuel nozz es D, D stand vertically and project res ectively throughthe two openings b, b', in placed substantially central therein, an projecting part roo way through the holes e', e2 in the valve.

The lower ends of these two holes e', e2 are circumferentially enlarged' to form what The function of these slots is to furnish an opening through which the nozzles may project into the valve, even when the, valve. is in' -the closed position as shown in Fig. 2. A screw K, which screws through the wall of the valve chamber in alinement with the slot e3 is provided in order to restrict to the required degree the sizeof the opening around the nozzle D through which air may flow into the hole e.' Each of the holes e', e2 is also circumferentially enlarged at itsupper end. The circumferential enlargement e5 of the vholeeextends a considerably greater distance circumferentially from the hole than does the circumferential enlargement es of the other hole'ez. rI hese two enlargements. eli and e have sides which vconverge i as they recede -from the holes; and the enlargement we@ is continued to its end in the form of a narrow' slot with parallel sides.

When the valve-is lin the closed position, as' .sh'o'wn in Fig.'2, and as shown diagrammatically 'in 14`ig.15, the enlargement e of the-hole-e2 is entirely covered by the upper wall of the valve casing, so that no air whatever'can flow through the hole e2. The circumferential'. enlargement of the 4hole e",

however, slightly overlaps the hole b2 in the valve casing, so as to provide, even when thevalve is closed,- avery small opening, through which air` may pass. It is, of

` course, not essential that'the valve can'never be entirely closed,.because the same effect can be produced, even if the enlargement e5 were wholly covered whenl the valve is closed by merely turning the valve slightly in the opening direction.

. It isv obvious that when the valve is vturned in the opening direction, the size of the passageway through the valve through which 4.air flows past the nozzle D will be gradually enlarged, and' will assume considerable proportion, before there is any .un-

. covering ofthe upper end ofthel hole e2,

v hole e.

such as will permit air to flow throughA said hole past -the nozzle D. Until, therefore,

-thethrottlevalve is open so as to begin to uncover the enlargement e? of the valve hole e2'all of the air flowing through the carbu-v pass through the reter will, of necessity,

Therefore all of the fuel drawn into'the carbureter will. come from the nozzle D. A carbureter such as is shown in the drawing, when employed with 'a six cylinder, sixty H. P. internal combustion motor on a motor car will provide a sufficient volume of the explosivemixture-to enable the car to run at approximately thirty miles an hour on a level road before any part of the hole e2 is opened at all to the opening movement of the valveE. To get a `larger volume of theexplosive mixture to enable the engine to run faster, or do more'work, the valve will be still further turned in the opening direction, so as to begin to uncover the upper end of the hole e2 'and allow air to flow through thefvalve hole 2f-thereby drawing the fuel from the nozzle D. As the valve continues to move in the openingdirection, the effective size of the hole thro'ugh which air flows past the nozzle D increases more rapidly than does the size of the other hole. As before stated, the holes b', b3 and e2 are larger than the holes b, b2

and e. The capacity of the two nozzles is,

however, substantially the same. Therefore there will be more air in proportion to fuel vapor in the stream which Hows into the mixing chamber through'the hole b2, than inthe stream which flows through tle hole' b. 'This plays anot unimportant part in maintaining the uniformity of the mixture at high speeds. In fact, with the parts proportioned substantially as shown 1n the drawings, the explosive mixture formed and supplied to the engine will be fairly uniform at all times, and its-volume will vary .in accordance with the position of the valve. The arrangement is additionally extremely economical, since it is such.I as furnishes a carbureter of 'comparatively small capacity when the Work which the'engine is called -upon to do is light, but which increases the capacity of the carbureter in accordance when the engine is idle, drip and flow into` and :partly fill the duct f. An air tube is arranged within the vertical part of the vduct f and extends down nearly to the bottom thereof, and its upper end is arranged so that any fuel drawn up through said tube may be discharged into a duct bIS in the Wall of the valve chamber whose inner end isy just over the tenter of thecircumferential enlargemente of the hole e. After the engine has been at rest forsome time a considerable quantity of gasolene will accumulate in the duct f. When the engine is started, there will be a small stream of air owing'through the hole-e', and out of the end of the circumferential enlar ement thereof e5 past this duct d5, and this air stream will draw the fuel from duct f up through the tube H and duct b, so as to furnish a small starting charge of the explosive mixture. By the time the fuel so drawn from the duct f has been exhausted, the valve should be slightly opened, wherefore fuel will be drawn from the nozzle D in sufficient quantities to make an explosive mixture which will keep the engine going.

The features of construction described in the foregoing paragraph are adaptations to the present structure of characteristics of construction which are shown and claimed in Patent No. 998,123, granted to Scaife July 18, 1911.

The sheath g is not in communication with the duct f. It is, however,-provided with a plurality of perforations. g2 through which air will be drawn when the valve has been opened sulicient-ly wide to cause an air stream to flow through the valve hole c2. This increases to a slight extent the proportion of air to fuel which flows out of the hole 62,-and also helps vaporize the fuel spray.

Having described my invention, I claim:

1. In a carbureter, the combination of a mixing chamber, a valve casing below said mixing chamber having two openings in its top wall communicating with the mixing chamber and two openings through its lower wall communicating with the atmosphere, a movable valve in said casing having two holes through it adapted to be brought into registering relation with said upper and lower holes in the valve casing, the holes through the valve being unequally enlarged at their discharge ends in the direction of the movement of said valve whereby as the valve moves in the opening direction the uncovering of one of said holes will be begun in advance of the other, and two fuel nozzles which project up through the lower holes in the valve casing and partly through the holes in the valve.

2. In a carbureter, the combination of a mixing chamber and below that a horizontal cylindrical valve casing which has in its upper wall two openings which communicate with thel mixing chamber, and in its lower walls two openings which communicate with the atmosphere, a rotatable cylindrical valve in said casing having through it two holes which are enlarged circumferentially unequal distances at their discharge mixing chamber and below that a horizontal lcylindricalvalve casing which has in its upper wall two openings which communicate with the mixing chamber and in its lower wall two openings which communicate with the atmosphere, a rotatable cylindrical valve in said casing having through it`two holes which whenl the valve is wide open will register with the holes in the upper and lower walls of the`valve casing, each of said holes through the valve having at their discharge ends circumferential enlargements of decreasing width,'one of said enlargements being materially longer than the other, and two fuel nozzles which respectively pass through the lower openings in the valve casing and into the holes throughthe valve.

4. In a carbureter, the combination of a mixing chamber, a cylindrical valve casing having in its upper wall leading to said mixing chamberl two holes of unequal size and having in its lower wall two holes of unequal size which are respectively associated with the twoupper holes, a rotatable cylindrical valve in said casing having through it two holes of unequal diameter of which the smaller hole is adapted to register with the two small holes in the casing, and the larger is adapted to register with the two large holes in the casing, yboth of the holes in the valve being circumferent-ially enlarged at their discharge ends,

.the enlargement of `t-he smaller hole being longer than the other, and the fuel nozzles which project through the two lower holes in the casing and into the holes through the valve.

In testimony whereof I hereunto atlix my signature in the presence of two witnesses. ROLLIN H. WHITE.

Witnesses:

I-I. R. SULLIVAN, E B. GILCHRIST. 

